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Finding the Fourth Proportional to 112,169.40, 168,059.70 and 72,706.20

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Solution

The fourth proportional to 112,169.40, 168,059.70 and 72,706.20 is: 108,933.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,169.40 : 168,059.70 = 72,706.20 : x
  2. Step 2: Convert to fraction form
    112,169.40/168,059.70 = 72,706.20/x
  3. Step 3: Cross multiply
    112,169.40x = 168,059.70 × 72,706.20
  4. Step 4: Simplify right side
    112,169.40x = 12,218,982,160.14
  5. Step 5: Solve for x
    x = 12,218,982,160.14/112,169.40
  6. Step 6: Final answer
    x = 108,933.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.